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Hydraulic props

Hydraulic propHydraulic props are intended for roof support, roof support brackets pressing against mine roof and exercising force resistance to roof lowering and dropping.

The prop is a hydraulic advancing cylinder with two-way hydraulic extension. The prop consists of a plunger (piston), shaft, check valve and other minor components.

JSC «DAP» provides chromium-plating of internal functional surfaces of the cylinder and plunger increasing their corrosion resistance and, correspondingly, increasing operational life and durability.

Working fluid

Any oil-water sludge permissible to use in coal mining facilities, with purity class grade 15 and higher according to DSTU GOST 17216, and industrial oils with the same purity class.

  1КД80.13.
01.000
1КД80.14.
01.000
1КД80.16.
01.000
1КД99.14.
01.000
1КД90.27.
01.000
2КД90.21.
01.000
2КД90Т.60.
01.000
МК98.31.
01.000
Nominal extension, mm 503 495 495 555 593 734 851 664
Nominal load capacity, kN 700 700 700 820 820 700 1290 820
Head end pressure, MPa 32 32 32 39 39 32 39 39
Plunger end pressure, MPa 67 67 67 82 82 67 69 82
Prop height in non-extension mode, mm 537 545 545 573 594 687 678 625
Weight, kg  102 104 104 97 104 119 182 110
Developer DONGIPROUGLEMASH (Ukraine)